So, there are two kinds of business books.
The first kind contains a simple truth and then tries to persuade you to actually do something.
The second needs a big pad of paper and a pencil. This is the kind of book that covers the mechanics of a skill. Things like process control or cost accounting.
Josh comes through with a big ol list of the first type. Link: Josh Kaufman: Inside My Bald Head: The Josh Kaufman "Personal MBA" Program.